forked from mirrors/gecko-dev
fee88c0518
If we synchronously shut down the prompt, that will exit modal state while we're still processing our mouse or key event, which happens _before_ Gecko runnable processing. Exiting modal state will generally post a runnable to run timeouts, so we can end up processing that runnable before we return from processNextEvent and unwind to whatever code did the alert() call on the web page. The upshot is that the webpage will see timeouts fire before the alert() call returns. If we exit modal state off a Gecko runnable instead, that will ensure that we return to the nsPrompter code immediately after exiting modal state, see that the prompt is no longer active, and return to the calling web page code _before_ processing any more runnables.
72 lines
2.3 KiB
JavaScript
72 lines
2.3 KiB
JavaScript
"use strict";
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/*
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* This test triggers multiple alerts on one single tab, because it"s possible
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* for web content to do so. The behavior is described in bug 1266353.
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*
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* We assert the presentation of the multiple alerts, ensuring we show only
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* the oldest one.
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*/
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add_task(function*() {
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const PROMPTCOUNT = 5;
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let contentScript = function() {
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var i = 5; // contentScript has no access to PROMPTCOUNT.
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window.addEventListener("message", function() {
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i--;
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if (i) {
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window.postMessage("ping", "*");
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}
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alert("Alert countdown #" + i);
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});
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window.postMessage("ping", "*");
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};
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let url = "data:text/html,<script>(" + encodeURIComponent(contentScript.toSource()) + ")();</script>"
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let promptsOpenedPromise = new Promise(function(resolve) {
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let unopenedPromptCount = PROMPTCOUNT;
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Services.obs.addObserver(function observer() {
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unopenedPromptCount--;
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if (!unopenedPromptCount) {
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Services.obs.removeObserver(observer, "tabmodal-dialog-loaded");
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info("Prompts opened.");
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resolve();
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}
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}, "tabmodal-dialog-loaded", false);
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});
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let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, url, true);
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info("Tab loaded");
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yield promptsOpenedPromise;
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let promptsCount = PROMPTCOUNT;
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while (promptsCount--) {
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let prompts = tab.linkedBrowser.parentNode.querySelectorAll("tabmodalprompt");
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is(prompts.length, promptsCount + 1, "There should be " + (promptsCount + 1) + " prompt(s).");
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// The oldest should be the first.
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let i = 0;
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for (let prompt of prompts) {
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is(prompt.Dialog.args.text, "Alert countdown #" + i, "The #" + i + " alert should be labelled as such.");
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if (i !== promptsCount) {
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is(prompt.hidden, true, "This prompt should be hidden.");
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i++;
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continue;
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}
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is(prompt.hidden, false, "The last prompt should not be hidden.");
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prompt.onButtonClick(0);
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// The click is handled async; wait for an event loop turn for that to
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// happen.
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yield new Promise(function(resolve) {
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Services.tm.mainThread.dispatch(resolve, Ci.nsIThread.DISPATCH_NORMAL);
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});
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}
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}
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let prompts = tab.linkedBrowser.parentNode.querySelectorAll("tabmodalprompt");
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is(prompts.length, 0, "Prompts should all be dismissed.");
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yield BrowserTestUtils.removeTab(tab);
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});
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